Colors (слэш)

What if you pass by your soulmate and don't even notice? How long would it take to find them again? And what do you do when you're on opposite sides of the field?
Sena Kobayakawa spends almost 6 years torn in Half, knowing he'd passed his soulmate, but unable to remember when or who. Colors are the first clue, as only paired soulmates can see them, but the symptoms increase and worsen the longer they're apart, making school and life in general difficult. Six years of dreaming and waiting and hoping, and he never could have expected this.